I’m sorry, but I disagree with your perspective.
OP has clearly expressed that he’s not getting what he wants or needs in this relationship, and his feelings and desires do matter too. Emotional connection is incredibly important, but so is sexual connection—it’s a vital part of a healthy, balanced relationship.
It seems that the wife isn’t keen to work on the treatment condition despite knowing about the condition and the impact on their marriage. If she was actively seeking treatment and putting in the effort to work through this, I’d understand your viewpoint more. But if she’s not willing to take action, it’s unfair to expect OP to sacrifice his own happiness and well-being.
Relationships require effort from both sides, and both emotional and physical aspects should be addressed.